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A tuna (pl.: tunas or tuna) is a saltwater fish that belongs to the tribe Thunnini, a subgrouping of the Scombridae family.The Thunnini comprise 17 species across five genera, [2] the sizes of which vary greatly, ranging from the bullet tuna (max length: 50 cm or 1.6 ft, weight: 1.8 kg or 4 lb) up to the Atlantic bluefin tuna (max length: 4.6 m or 15 ft, weight: 684 kg or 1,508 lb), which ...
The Atlantic bluefin tuna (Thunnus thynnus) is a species of tuna in the family Scombridae.It is variously known as the northern bluefin tuna (mainly when including Pacific bluefin as a subspecies), giant bluefin tuna (for individuals exceeding 150 kg [330 lb]), and formerly as the tunny.
More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described. [13] The total number of related DNA base pairs on Earth is estimated at 5.0 x 10 37 and weighs 50 billion tonnes. [14]
All tunas are extremely strong, muscular swimmers, and the yellowfin tuna is known to reach speeds of up to 50 miles per hour (80 km/h) when pursuing prey. As with all tunas, members of this genus are warm-blooded , which is a rare trait among fish; this enables them to tolerate cold waters and to dive to deeper depths. [ 3 ]
Australian catch peaked in 1982 at 21,500 tonnes, and the total population of SBT has since declined by about 92 percent. [41] There was a pressing obligation to reduce harvesting pressure southern bluefin tuna populations in the mid-1980s.
Tunas, bonitos, billfishes: 5,943,593 5 816 647 5 782 841 6 138 999 6 197 087 6 160 868 6 243 122 Pelagic fish: Miscellaneous pelagic fishes 10,712,994 10 654 041 12 332 170 11 772 320 11 525 390 11 181 871 11 179 641 Sharks etc. Sharks, rays, chimaeras: 858,007 870 455 845 854 845 820 880 785 819 012 771 105 Other fish Marine fishes not identified
The total amount of DNA base pairs on Earth, as a possible approximation of global biodiversity, is estimated at 5.0 x 10 37, and weighs 50 billion tonnes. [7] In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).
Yellowfin is often marketed as ahi, from the Hawaiian ʻahi, a name also used there for the closely related bigeye tuna. [3] The species name, albacares ("white meat") can also lead to confusion: in English, the albacore ( Thunnus alalunga ) is a different species, while yellowfin is officially designated albacore in French and referred to as ...